:root {
  --primary: #0284C7; --primary-hover: #0369A1; --secondary: #38BDF8;
  --accent: #FB923C; --success: #10B981; --error: #EF4444;
  --bg: #081420; --bg-elevated: #0D1E2E; --bg-card: #122838;
  --bg-input: #0A1824; --text: #E0F0FA; --text-muted: #80B0D0; --text-dim: #446888;
  --border: #1E3850; --border-hover: #2D5070; --radius: 12px; --radius-sm: 8px;
  --font: 'Inter', system-ui, sans-serif; --mono: monospace; --transition: 200ms ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;overflow:hidden}
.app{display:flex;flex-direction:column;height:100vh}

.header{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--bg-elevated);border-bottom:1px solid var(--border);gap:12px;flex-shrink:0}
.header-left{display:flex;align-items:center;gap:12px}
.logo{font-size:1.3rem}
.header-title{font-size:1.05rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.header-right{display:flex;gap:8px;align-items:center}
.search-input{padding:7px 12px;font-size:.78rem;font-family:var(--font);background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);outline:none;width:200px}
.search-input:focus{border-color:var(--primary)}

.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;font-size:.8rem;font-weight:500;font-family:var(--font);border:none;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);white-space:nowrap}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-hover));color:#fff;box-shadow:0 2px 8px rgba(2,132,199,.3)}
.btn-primary:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 16px rgba(2,132,199,.4)}

.main{display:grid;grid-template-columns:1fr 1fr;flex:1;overflow:hidden;gap:1px;background:var(--border)}
.panel{display:flex;flex-direction:column;background:var(--bg);overflow-y:auto;padding:16px;gap:10px}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:8px}
.panel-title{font-size:.85rem;font-weight:600;white-space:nowrap}
.line-count{font-size:.68rem;color:var(--text-dim)}
.section-label{font-size:.72rem;font-weight:600;color:var(--text-dim);text-transform:uppercase;letter-spacing:.5px}

.tabs{display:flex;gap:4px;flex-wrap:wrap}
.tab{padding:5px 10px;font-size:.7rem;font-family:var(--font);background:transparent;border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-muted);cursor:pointer;transition:all var(--transition)}
.tab:hover{background:var(--bg-card);color:var(--text)}
.tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}

.template-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:6px}
.template-chip{padding:8px 10px;font-size:.72rem;font-weight:500;font-family:var(--font);background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-muted);cursor:pointer;transition:all var(--transition);text-align:center}
.template-chip:hover{border-color:var(--border-hover);color:var(--text)}
.template-chip.selected{background:rgba(2,132,199,.15);border-color:var(--primary);color:var(--primary)}

.custom-editor{width:100%;padding:10px 12px;font-family:var(--mono);font-size:.75rem;line-height:1.5;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--accent);resize:vertical;outline:none}
.custom-editor:focus{border-color:var(--primary)}

.output{flex:1;padding:16px;font-family:var(--mono);font-size:.78rem;line-height:1.6;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--secondary);overflow:auto;white-space:pre-wrap;margin:0}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:10px 20px;background:var(--bg-card);border:1px solid var(--primary);border-radius:var(--radius-sm);color:var(--primary);font-size:.8rem;font-weight:500;z-index:200;animation:toast-in .3s ease}
@keyframes toast-in{from{opacity:0;transform:translateX(-50%) translateY(10px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
@media(max-width:768px){.main{grid-template-columns:1fr;grid-template-rows:1fr 1fr}.header{flex-wrap:wrap}.search-input{width:100%}}